Additional resolvers batching with multiple parameters for additional data source

[mkyukov]

Hello everyone! Loving everything GraphQL Mesh provides, I think it's a project with massive potential.

Is it possible to configure an additionalResolver which would query a secondary data source, but provide multiple parameters to the secondary data source. For example:

- targetTypeName: FeedItem
    targetFieldName: commentCount
    sourceName: SecondaryDataSource
    sourceTypeName: Query
    sourceFieldName: commentsCount
    keyField: id
    keysArg: { contentId, culture } 

The keysArg in this case in this case is just an example. I would like to extend the FeedItem type from the primary data source with the commentCount, the data for which would come from the SecondaryDataSource. The thing is, the secondary data source needs both a contentId and culture parameter. As far as I could see this isn't specified in the documentation.

An additional question (not sure it warrants an extra discussion) - is there a way I could get the culture parameter passed from the "parent query" to this one? I know it's possible to use for example root.culture, but that would be valid if the culture property was a part of the FeedItem. Let me know if I should create this as a separate discussion.

Thanks in advance for your time!